Opinion: Why the Apple Watch might be bad for your heart

Given that I’m not someone who is overly fond of new gadgets, the arrival of the new Apple Watch 3 didn’t really make that much of an impression on me. But a new feature of this latest Apple Watch is interesting because, unlike other devices, it can measure the electrical activity of your heart.
Heart rate monitors are not new, of course. A study in JAMA Cardiology found that four of the commercially available wrist-worn heart rate monitors (Apple Watch, Fitbit Charge HR, Mio Fuse an